1. First open the SAI software, click "Others" to enter and see the shortcut key settings.
2. In Sai, you cannot configure key combinations by yourself, because most of the key combinations available on the keyboard are built-in by default. All you need to do is assign a shortcut to a certain key or key combination. Function.
3. To set "ShiftAltPageUp" as the screen magnification function, first select PageUp in the key list and ignore the function menu on the right.
4. Then check the boxes in front of Shift and Alt, and you will find that all the keys have become the ShiftAlt*** key combination.
5. The last thing to do is to find "Zoom in" in the function menu on the right. Click on the left to associate this function with the ShiftAltPageUp shortcut key. After setting, click OK to save.